Process for the extraction of sugar from sugar juices



Patented F ebLi Z B,

UNITED STATES:

rr cs Ann: MEIRO, or BRUSSELS,BELGTUM rnocnss ron m EXTRACTION Lon- SUGAR mom SUGAR. :JUIoEs;

No Drawing. Application med mu so, 1931, ser al 511495, and iamm August 26, 1930. F

The invention relates to a process for treating sugar juice and refers more particularly to a process for completely extracting of all the sugar and solid matter from the juice of sugar. cane. and of beetroot and of, all

, plants containingsugar.

All juice of beetroot, sugarcane and the juice of all plants containingsugar,slightly alkaline or neutral," is evaporated ,in the known manner in apparatus of any kind (in a vacuum or'under atmospheric pressure).

The present invention comprises the feature that, in order to obtaina dry mass consisting of all solid matter in the juice, the latter is mixed with. oil of any-kind, nonsaponifying and'hot,preferably not above 7 C., in quantities from about three to five,

times the weight of alljsolid matter in'the 1 juice in a dehydrated state. I This non-saponifying oil must have a boiling pointtabove that of the water in the sugar syrup, the most suitable oils being petroleum oils. i

the mixture, the Water is evaporated rapidly. Such oil, which is hot," destroys the elements of fermentation in enzymes, bacteria and other juice andprevents their formation. During the rotary motion of the hot oil with the juice to be evaporated, no incrustation of salts or other solid matter forms on the walls gfavours the coagulation ofthe albuminous substances and of other globules of "granular 4 some of its combinations; they dissolve several colouring matters, in the juice, such as the chlorofyl, etc. I

This oil in a state of emulsion also plays a mechanical part, i..e. it lubricates the solid matter in the juice, and thus acts as an ;in.f

All this liquid mixture of juice and oil in i 25 the apparatus, is heated indirectly byste'am,

and owing to they rotary motion imparted to V and the coils of the evaporators. The heating and the subsequent filtering of the juice saponifying oils, preferably ribs containing the juice I "sulator to prevent. or reduce the reactions of" the solid matter in the juice.

. Thee d of the evaporation takes place in the oil itself, until all thesolid matter in the "juice isobtained: in a completely dehydrated 5 form. This dehydration "may be, facilitated "by blowing hot air',either intothe mass under treatment, or above the same, to remove the last traces oftmoisture. When the evapora-F ,ti'on of the water is finished,: stirring is stopped and the thenstationary as well as the solid matter'which'mostly falls below theoil in the apparatus then the oil is filtered for regeneration and the following similar opera- 6 tions. Y Then an ether, for'instance petroleum tsp'iritpis added to the crystallized and coagulate'dl solid matter residue, which contains traces offoil. The mixture is, kneaded and heatedsimultaneously,byindirect, application 7 7 ofsteam, and th enthe ether and theoil are removed by filtering. 7 These steps maybe carried out in a device commonly knownas .the' Soxhlet apparatus .which 1 consists of a hermetically closed container, the interior of whichis divided by afilter, the upper part bemg provided with a stirrer. Since sugar does not dissolvein ether or in oil, a mixture of'these two substances..will not remove anyi sugar'from the residue, g After having been washed with ethers, the dehydratedsolid' matter is again washed in i the known manner in ethyl or methylalcoi a hol in a hermetically, closed apparatus of any suitable construction, for instancethe Soxhlet apparatus. The raw sugar obtained aiterthistreatment issubjectedt o the usual operations, such as decoloration; .Since the residue of thesolid matter in the juice is completely d y after hecxtraction of all the sugar has taken place, it constitutesan orgarlic beetroot orother plants. By the useof thisprocess for treating the juice of beetroots sugar cane and of other plants containingsugar, therenis obtained (a) A'complete extraction of the sugar in' r inorganic fertilizer for the culture of a (b)-A complete separation of the sugar from the other solid matter contained in the.

juice-such as organic or inor *and (c) The suppression of molasses, which increases the percentage of crystallized sugar,

ganic fertilizers as compared with processes known in prior art.

I claim:

1. A process for extracting sugar, comprising the steps of evaporating a sugarjuice in a non-saponifying oil having a boiling point higher than the boiling point ofsugazr juioe maintaining the mixture of oil and juice in a state of emulsion until the coagulation and crystallization of the sugar and non-sacchar ine parts takes place and separating them from the oil.

2. A process according to claim 1,-Icharacterized in that the oil used for evaporation containspetroleum.

' 3. A process according to claiml, charac- LtGI'lZQCl in that'the oil is added to the juice in the proportion of about threeto five times the weight of the sugar and ofthenon-sacch- "arine solids contained inthe juice.

4. A process .accordin'gto claim '1, characterized in thatt'he .oil is added to the juice in a heated state,its temperature not exceeding about C. V

5, A process ,for extracting sugar from sugar cane'and beet root, comprising the steps of dehydratingzthe sugar and solidmatter containedin a juice. by evaporating said juice in a non-saponifying oil, said evaporation being carried outuntil a coagulation and crystallization of the substances dissolved in said juice takes place, separating said-sugar and solid matter from said oil by decanting, washing the residuecwith an ether, and then washing'said residue'with an alcohol.

6. A process of treating a sugar containing juice comprising in combinaton the steps of mixing a juice containing sugar and water with a non-saponifying oil, and heating the mixture until said watertis evaporated, the substances contained in said juicerin a dissolved state and in suspension'being coagu lated and crystallizedatthe end of the evaporation.

7. A process for extracting sugar from sugar cane and beet root, compris ng In combination, adding a hot non-'saponi'fymg .oil to, a sucrose-containing juice, evaporating the mixture, washingythe residue with an ether for the purpose of removing said oil, and then washing the residue with an alcohol-containing substance.

"In testimony whereof I have signed my name to this specification.

ADAM

Memo. 

